Add logic to set the alt body from a view file

[bopinto]

PHPMailer already strips the HTML body to set the alt body, but we may want to set it on our own.

[surfer190]

I opened an issue #28. Why is the html automatically converted...thats annoying. What about links, jut showing their text and not the url.

And setting $mail->altBody('Hello world');

[vernes]

Merged, thanks

[surfer190]

@vernes @bopinto I noticed that setting an altBodywith something like:

$mail->altBody('Hello world');

doesn't matter as this value is overwritten no matter what. I think the issue is in PHPMailer: the msgHTML function. The function docs says it:

Overwrites any existing values in $this->Body and $this->AltBody

[vernes]

Yes https://github.com/PHPMailer/PHPMailer/blob/master/class.phpmailer.php#L3335-L3339

But using textView from this PR you can overide it after it renders html body